Mercurial > hg
annotate tests/badserverext.py @ 37627:cfb32979abcd
setup: add packages for concurrent.futures
We conceivably don't need to distribute this package on Python 3
since we will use the version in the standard library. However,
we want installs to be usable of multiple versions of Python. So
it is best to always have it.
Differential Revision: https://phab.mercurial-scm.org/D3265
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Mon, 09 Apr 2018 12:27:52 -0700 |
parents | aacfca6f9767 |
children | cbfab495dbcf |
rev | line source |
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1 # badserverext.py - Extension making servers behave badly |
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2 # |
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3 # Copyright 2017 Gregory Szorc <gregory.szorc@gmail.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 # no-check-code |
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9 |
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10 """Extension to make servers behave badly. |
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11 |
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12 This extension is useful for testing Mercurial behavior when various network |
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13 events occur. |
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14 |
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15 Various config options in the [badserver] section influence behavior: |
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16 |
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17 closebeforeaccept |
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18 If true, close() the server socket when a new connection arrives before |
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19 accept() is called. The server will then exit. |
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20 |
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21 closeafteraccept |
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22 If true, the server will close() the client socket immediately after |
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23 accept(). |
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24 |
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25 closeafterrecvbytes |
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26 If defined, close the client socket after receiving this many bytes. |
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27 |
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28 closeaftersendbytes |
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29 If defined, close the client socket after sending this many bytes. |
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30 """ |
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31 |
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32 from __future__ import absolute_import |
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33 |
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34 import socket |
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35 |
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36 from mercurial import( |
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37 registrar, |
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38 ) |
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39 |
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40 from mercurial.hgweb import ( |
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41 server, |
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42 ) |
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43 |
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44 configtable = {} |
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45 configitem = registrar.configitem(configtable) |
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46 |
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47 configitem(b'badserver', b'closeafteraccept', |
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48 default=False, |
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49 ) |
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50 configitem(b'badserver', b'closeafterrecvbytes', |
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51 default='0', |
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52 ) |
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53 configitem(b'badserver', b'closeaftersendbytes', |
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54 default='0', |
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55 ) |
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56 configitem(b'badserver', b'closebeforeaccept', |
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57 default=False, |
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58 ) |
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59 |
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60 # We can't adjust __class__ on a socket instance. So we define a proxy type. |
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61 class socketproxy(object): |
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62 __slots__ = ( |
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63 '_orig', |
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64 '_logfp', |
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65 '_closeafterrecvbytes', |
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66 '_closeaftersendbytes', |
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67 ) |
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68 |
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69 def __init__(self, obj, logfp, closeafterrecvbytes=0, |
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70 closeaftersendbytes=0): |
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71 object.__setattr__(self, '_orig', obj) |
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72 object.__setattr__(self, '_logfp', logfp) |
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73 object.__setattr__(self, '_closeafterrecvbytes', closeafterrecvbytes) |
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74 object.__setattr__(self, '_closeaftersendbytes', closeaftersendbytes) |
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75 |
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76 def __getattribute__(self, name): |
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77 if name in ('makefile',): |
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78 return object.__getattribute__(self, name) |
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79 |
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80 return getattr(object.__getattribute__(self, '_orig'), name) |
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81 |
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82 def __delattr__(self, name): |
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83 delattr(object.__getattribute__(self, '_orig'), name) |
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84 |
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85 def __setattr__(self, name, value): |
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86 setattr(object.__getattribute__(self, '_orig'), name, value) |
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87 |
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88 def makefile(self, mode, bufsize): |
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89 f = object.__getattribute__(self, '_orig').makefile(mode, bufsize) |
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90 |
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91 logfp = object.__getattribute__(self, '_logfp') |
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92 closeafterrecvbytes = object.__getattribute__(self, |
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93 '_closeafterrecvbytes') |
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94 closeaftersendbytes = object.__getattribute__(self, |
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95 '_closeaftersendbytes') |
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96 |
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97 return fileobjectproxy(f, logfp, |
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98 closeafterrecvbytes=closeafterrecvbytes, |
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99 closeaftersendbytes=closeaftersendbytes) |
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100 |
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101 # We can't adjust __class__ on socket._fileobject, so define a proxy. |
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102 class fileobjectproxy(object): |
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103 __slots__ = ( |
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104 '_orig', |
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105 '_logfp', |
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106 '_closeafterrecvbytes', |
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107 '_closeaftersendbytes', |
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108 ) |
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109 |
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110 def __init__(self, obj, logfp, closeafterrecvbytes=0, |
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111 closeaftersendbytes=0): |
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112 object.__setattr__(self, '_orig', obj) |
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113 object.__setattr__(self, '_logfp', logfp) |
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114 object.__setattr__(self, '_closeafterrecvbytes', closeafterrecvbytes) |
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115 object.__setattr__(self, '_closeaftersendbytes', closeaftersendbytes) |
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116 |
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117 def __getattribute__(self, name): |
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118 if name in ('read', 'readline', 'write', '_writelog'): |
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119 return object.__getattribute__(self, name) |
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120 |
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121 return getattr(object.__getattribute__(self, '_orig'), name) |
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122 |
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123 def __delattr__(self, name): |
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124 delattr(object.__getattribute__(self, '_orig'), name) |
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125 |
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126 def __setattr__(self, name, value): |
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127 setattr(object.__getattribute__(self, '_orig'), name, value) |
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128 |
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129 def _writelog(self, msg): |
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130 msg = msg.replace('\r', '\\r').replace('\n', '\\n') |
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131 |
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132 object.__getattribute__(self, '_logfp').write(msg) |
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133 object.__getattribute__(self, '_logfp').write('\n') |
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134 object.__getattribute__(self, '_logfp').flush() |
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135 |
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136 def read(self, size=-1): |
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137 remaining = object.__getattribute__(self, '_closeafterrecvbytes') |
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138 |
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139 # No read limit. Call original function. |
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140 if not remaining: |
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141 result = object.__getattribute__(self, '_orig').read(size) |
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142 self._writelog('read(%d) -> (%d) (%s) %s' % (size, |
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143 len(result), |
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144 result)) |
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145 return result |
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146 |
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147 origsize = size |
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148 |
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149 if size < 0: |
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150 size = remaining |
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151 else: |
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152 size = min(remaining, size) |
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153 |
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154 result = object.__getattribute__(self, '_orig').read(size) |
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155 remaining -= len(result) |
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156 |
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157 self._writelog('read(%d from %d) -> (%d) %s' % ( |
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158 size, origsize, len(result), result)) |
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159 |
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160 object.__setattr__(self, '_closeafterrecvbytes', remaining) |
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161 |
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162 if remaining <= 0: |
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163 self._writelog('read limit reached, closing socket') |
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164 self._sock.close() |
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165 # This is the easiest way to abort the current request. |
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166 raise Exception('connection closed after receiving N bytes') |
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167 |
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168 return result |
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169 |
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170 def readline(self, size=-1): |
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171 remaining = object.__getattribute__(self, '_closeafterrecvbytes') |
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172 |
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173 # No read limit. Call original function. |
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174 if not remaining: |
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175 result = object.__getattribute__(self, '_orig').readline(size) |
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176 self._writelog('readline(%d) -> (%d) %s' % ( |
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177 size, len(result), result)) |
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178 return result |
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179 |
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180 origsize = size |
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181 |
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182 if size < 0: |
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183 size = remaining |
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184 else: |
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185 size = min(remaining, size) |
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186 |
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187 result = object.__getattribute__(self, '_orig').readline(size) |
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188 remaining -= len(result) |
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189 |
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190 self._writelog('readline(%d from %d) -> (%d) %s' % ( |
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191 size, origsize, len(result), result)) |
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192 |
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193 object.__setattr__(self, '_closeafterrecvbytes', remaining) |
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194 |
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195 if remaining <= 0: |
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196 self._writelog('read limit reached; closing socket') |
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197 self._sock.close() |
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198 # This is the easiest way to abort the current request. |
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199 raise Exception('connection closed after receiving N bytes') |
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200 |
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201 return result |
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202 |
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203 def write(self, data): |
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204 remaining = object.__getattribute__(self, '_closeaftersendbytes') |
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205 |
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206 # No byte limit on this operation. Call original function. |
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207 if not remaining: |
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208 self._writelog('write(%d) -> %s' % (len(data), data)) |
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209 result = object.__getattribute__(self, '_orig').write(data) |
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210 return result |
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211 |
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212 if len(data) > remaining: |
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213 newdata = data[0:remaining] |
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214 else: |
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215 newdata = data |
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216 |
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217 remaining -= len(newdata) |
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218 |
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219 self._writelog('write(%d from %d) -> (%d) %s' % ( |
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220 len(newdata), len(data), remaining, newdata)) |
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221 |
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222 result = object.__getattribute__(self, '_orig').write(newdata) |
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223 |
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224 object.__setattr__(self, '_closeaftersendbytes', remaining) |
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225 |
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226 if remaining <= 0: |
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227 self._writelog('write limit reached; closing socket') |
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228 self._sock.close() |
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229 raise Exception('connection closed after sending N bytes') |
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230 |
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231 return result |
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232 |
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233 def extsetup(ui): |
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234 # Change the base HTTP server class so various events can be performed. |
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235 # See SocketServer.BaseServer for how the specially named methods work. |
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236 class badserver(server.MercurialHTTPServer): |
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237 def __init__(self, ui, *args, **kwargs): |
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238 self._ui = ui |
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239 super(badserver, self).__init__(ui, *args, **kwargs) |
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240 |
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241 recvbytes = self._ui.config('badserver', 'closeafterrecvbytes') |
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242 recvbytes = recvbytes.split(',') |
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243 self.closeafterrecvbytes = [int(v) for v in recvbytes if v] |
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244 sendbytes = self._ui.config('badserver', 'closeaftersendbytes') |
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245 sendbytes = sendbytes.split(',') |
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246 self.closeaftersendbytes = [int(v) for v in sendbytes if v] |
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247 |
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248 # Need to inherit object so super() works. |
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249 class badrequesthandler(self.RequestHandlerClass, object): |
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250 def send_header(self, name, value): |
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251 # Make headers deterministic to facilitate testing. |
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252 if name.lower() == 'date': |
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253 value = 'Fri, 14 Apr 2017 00:00:00 GMT' |
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254 elif name.lower() == 'server': |
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255 value = 'badhttpserver' |
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256 |
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257 return super(badrequesthandler, self).send_header(name, |
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258 value) |
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259 |
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260 self.RequestHandlerClass = badrequesthandler |
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261 |
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262 # Called to accept() a pending socket. |
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263 def get_request(self): |
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264 if self._ui.configbool('badserver', 'closebeforeaccept'): |
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265 self.socket.close() |
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266 |
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267 # Tells the server to stop processing more requests. |
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268 self.__shutdown_request = True |
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269 |
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270 # Simulate failure to stop processing this request. |
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271 raise socket.error('close before accept') |
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272 |
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273 if self._ui.configbool('badserver', 'closeafteraccept'): |
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274 request, client_address = super(badserver, self).get_request() |
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275 request.close() |
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276 raise socket.error('close after accept') |
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277 |
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278 return super(badserver, self).get_request() |
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279 |
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280 # Does heavy lifting of processing a request. Invokes |
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281 # self.finish_request() which calls self.RequestHandlerClass() which |
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282 # is a hgweb.server._httprequesthandler. |
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283 def process_request(self, socket, address): |
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284 # Wrap socket in a proxy if we need to count bytes. |
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285 if self.closeafterrecvbytes: |
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286 closeafterrecvbytes = self.closeafterrecvbytes.pop(0) |
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287 else: |
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288 closeafterrecvbytes = 0 |
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289 if self.closeaftersendbytes: |
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290 closeaftersendbytes = self.closeaftersendbytes.pop(0) |
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291 else: |
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292 closeaftersendbytes = 0 |
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293 |
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294 if closeafterrecvbytes or closeaftersendbytes: |
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295 socket = socketproxy(socket, self.errorlog, |
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296 closeafterrecvbytes=closeafterrecvbytes, |
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297 closeaftersendbytes=closeaftersendbytes) |
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298 |
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299 return super(badserver, self).process_request(socket, address) |
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300 |
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301 server.MercurialHTTPServer = badserver |